<?php

spl_autoload_register(function ($class) {
    if (substr($class, 0, 12) !== 'wpdFormAttr\\') {
      return;
    }
    $class = str_replace('\\', '/', $class);

    $path = dirname(__FILE__).'/'.$class.'.php';
    if (is_readable($path)) {
        require_once $path;
    }
});